| // Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| // @dart=2.9 |
| |
| import 'dart:ffi'; |
| import 'dart:io'; |
| |
| const arm = 'arm'; |
| const arm64 = 'arm64'; |
| const ia32 = 'ia32'; |
| const x64 = 'x64'; |
| |
| // https://stackoverflow.com/questions/45125516/possible-values-for-uname-m |
| final _unames = { |
| 'arm': arm, |
| 'aarch64_be': arm64, |
| 'aarch64': arm64, |
| 'armv8b': arm64, |
| 'armv8l': arm64, |
| 'i386': ia32, |
| 'i686': ia32, |
| 'x86_64': x64, |
| }; |
| |
| String _checkRunningMode(String architecture) { |
| // Check if we're running in 32bit mode. |
| final int pointerSize = sizeOf<IntPtr>(); |
| if (pointerSize == 4 && architecture == x64) return ia32; |
| if (pointerSize == 4 && architecture == arm64) return arm; |
| |
| return architecture; |
| } |
| |
| String _architecture() { |
| final String uname = Process.runSync('uname', ['-m']).stdout.trim(); |
| final String architecture = _unames[uname]; |
| if (architecture == null) { |
| throw Exception('Unrecognized architecture: "$uname"'); |
| } |
| |
| // Check if we're running in 32bit mode. |
| return _checkRunningMode(architecture); |
| } |
| |
| String _platformPath(String name, {String path = ''}) { |
| if (Platform.isMacOS || Platform.isIOS) { |
| return '${path}mac/${_architecture()}/lib$name.dylib'; |
| } |
| |
| if (Platform.isWindows) { |
| return '${path}win/${_checkRunningMode(x64)}/$name.dll'; |
| } |
| |
| // Unknown platforms default to Unix implementation. |
| return '${path}linux/${_architecture()}/lib$name.so'; |
| } |
| |
| DynamicLibrary dlopenPlatformSpecific(String name, {String path}) { |
| final String fullPath = _platformPath(name, path: path); |
| return DynamicLibrary.open(fullPath); |
| } |